Merge pull request #27 from mattleibow/dev/system-prompt-file

feat: Add system-prompt-file input for file-based system prompts

.github/workflows/ci.yml

@@ -67,3 +67,33 @@ jobs:
       - name: Print Output
         id: output
         run: echo "${{ steps.test-action.outputs.response }}"
+
+  test-action-prompt-file:
+    name: GitHub Actions Test with Prompt File
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+
+      - name: Create Prompt File
+        run: echo "hello" > prompt.txt
+
+      - name: Create System Prompt File
+        run:
+          echo "You are a helpful AI assistant for testing." > system-prompt.txt
+
+      - name: Test Local Action with Prompt File
+        id: test-action-prompt-file
+        uses: ./
+        with:
+          prompt-file: prompt.txt
+          system-prompt-file: system-prompt.txt
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+
+      - name: Print Output
+        run: |
+          echo "Response saved to: ${{ steps.test-action-prompt-file.outputs.response-file }}"
+          cat "${{ steps.test-action-prompt-file.outputs.response-file }}"

.github/workflows/linter.yml

@@ -38,7 +38,7 @@ jobs:
 
       - name: Lint Codebase
         id: super-linter
-        uses: super-linter/super-linter/slim@4e8a7c2bf106c4c766c816b35ec612638dc9b6b2
+        uses: super-linter/super-linter/slim@12150456a73e248bdc94d0794898f94e23127c88
         env:
           DEFAULT_BRANCH: main
           FILTER_REGEX_EXCLUDE: dist/**/*

.licenses/npm/undici.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: undici
-version: 5.28.5
+version: 5.29.0
 type: npm
 summary: An HTTP/1.1 client, written from scratch for Node.js
 homepage: https://undici.nodejs.org

CODEOWNERS

@@ -4,4 +4,4 @@
 ############################################################################
 
 # Default owners, unless a later match takes precedence.
-* @actions/actions-oss-maintainers
+* @actions/models

CONTRIBUTING.md

@@ -46,7 +46,7 @@ avoid having to include the `node_modules/` directory in the repository.
 1. Make your change, add tests, and make sure the tests still pass:
    `npm run test`
 1. Make sure your code is correctly formatted: `npm run format`
-1. Update `dist/index.js` using `npm run build`. This creates a single
+1. Update `dist/index.js` using `npm run bundle`. This creates a single
    JavaScript file that is used as an entrypoint for the action
 1. Push to your fork and [submit a pull request][pr]
 1. Pat yourself on the back and wait for your pull request to be reviewed and

README.md

@@ -7,7 +7,7 @@
 [![Coverage](./badges/coverage.svg)](./badges/coverage.svg)
 
 Use AI models from [GitHub Models](https://github.com/marketplace/models) in
-your actions.
+your workflows.
 
 ## Usage
 
@@ -34,27 +34,76 @@ jobs:
         run: echo "${{ steps.inference.outputs.response }}"
 ```
 
+### Using a prompt file
+
+You can also provide a prompt file instead of an inline prompt:
+
+```yaml
+steps:
+  - name: Run AI Inference with Prompt File
+    id: inference
+    uses: actions/ai-inference@v1
+    with:
+      prompt-file: './path/to/prompt.txt'
+```
+
+### Using a system prompt file
+
+In addition to the regular prompt, you can provide a system prompt file instead
+of an inline system prompt:
+
+```yaml
+steps:
+  - name: Run AI Inference with System Prompt File
+    id: inference
+    uses: actions/ai-inference@v1
+    with:
+      prompt: 'Hello!'
+      system-prompt-file: './path/to/system-prompt.txt'
+```
+
+### Read output from file instead of output
+
+This can be useful when model response exceeds actions output limit
+
+```yaml
+steps:
+  - name: Test Local Action
+    id: inference
+    uses: actions/ai-inference@v1
+    with:
+      prompt: 'Hello!'
+
+  - name: Use Response File
+    run: |
+      echo "Response saved to: ${{ steps.inference.outputs.response-file }}"
+      cat "${{ steps.inference.outputs.response-file }}"
+```
+
 ## Inputs
 
 Various inputs are defined in [`action.yml`](action.yml) to let you configure
 the action:
 
-| Name            | Description                                                                                                                           | Default                              |
-| --------------- | ------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------ |
-| `token`         | Token to use for inference. Typically the GITHUB_TOKEN secret                                                                         | `github.token`                       |
-| `prompt`        | The prompt to send to the model                                                                                                       | N/A                                  |
-| `system-prompt` | The system prompt to send to the model                                                                                                | `""`                                 |
-| `model`         | The model to use for inference. Must be available in the [GitHub Models](https://github.com/marketplace?type=models) catalog          | `gpt-4o`                             |
-| `endpoint`      | The endpoint to use for inference. If you're running this as part of an org, you should probably use the org-specific Models endpoint | `https://models.github.ai/inference` |
-| `max-tokens`    | The max number of tokens to generate                                                                                                  | 200                                  |
+| Name                 | Description                                                                                                                                       | Default                              |
+| -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------ |
+| `token`              | Token to use for inference. Typically the GITHUB_TOKEN secret                                                                                     | `github.token`                       |
+| `prompt`             | The prompt to send to the model                                                                                                                   | N/A                                  |
+| `prompt-file`        | Path to a file containing the prompt. If both `prompt` and `prompt-file` are provided, `prompt-file` takes precedence                             | `""`                                 |
+| `system-prompt`      | The system prompt to send to the model                                                                                                            | `"You are a helpful assistant"`      |
+| `system-prompt-file` | Path to a file containing the system prompt. If both `system-prompt` and `system-prompt-file` are provided, `system-prompt-file` takes precedence | `""`                                 |
+| `model`              | The model to use for inference. Must be available in the [GitHub Models](https://github.com/marketplace?type=models) catalog                      | `gpt-4o`                             |
+| `endpoint`           | The endpoint to use for inference. If you're running this as part of an org, you should probably use the org-specific Models endpoint             | `https://models.github.ai/inference` |
+| `max-tokens`         | The max number of tokens to generate                                                                                                              | 200                                  |
 
 ## Outputs
 
 The AI inference action provides the following outputs:
 
-| Name       | Description                 |
-| ---------- | --------------------------- |
-| `response` | The response from the model |
+| Name            | Description                                                             |
+| --------------- | ----------------------------------------------------------------------- |
+| `response`      | The response from the model                                             |
+| `response-file` | The file path where the response is saved (useful for larger responses) |
 
 ## Required Permissions
 
@@ -96,9 +145,10 @@ following steps:
    to create a new release in GitHub so users can easily reference the new tags
    in their workflows.
 
-## License 
+## License
 
-This project is licensed under the terms of the MIT open source license. Please refer to [MIT](./LICENSE.txt) for the full terms.
+This project is licensed under the terms of the MIT open source license. Please
+refer to [MIT](./LICENSE.txt) for the full terms.
 
 ## Contributions
 

__tests__/main.test.ts

@@ -7,7 +7,6 @@
  */
 import { jest } from '@jest/globals'
 import * as core from '../__fixtures__/core.js'
-
 const mockPost = jest.fn().mockImplementation(() => ({
   body: {
     choices: [
@@ -29,6 +28,81 @@ jest.unstable_mockModule('@azure-rest/ai-inference', () => ({
   isUnexpected: jest.fn(() => false)
 }))
 
+// Default to throwing errors to catch unexpected calls
+const mockExistsSync = jest.fn().mockImplementation(() => {
+  throw new Error(
+    'Unexpected call to existsSync - test should override this implementation'
+  )
+})
+const mockReadFileSync = jest.fn().mockImplementation(() => {
+  throw new Error(
+    'Unexpected call to readFileSync - test should override this implementation'
+  )
+})
+
+/**
+ * Helper function to mock file system operations for one or more files
+ * @param fileContents - Object mapping file paths to their contents
+ * @param nonExistentFiles - Array of file paths that should be treated as non-existent
+ */
+function mockFileContent(
+  fileContents: Record<string, string> = {},
+  nonExistentFiles: string[] = []
+): void {
+  // Mock existsSync to return true for files that exist, false for those that don't
+  mockExistsSync.mockImplementation((...args: unknown[]): boolean => {
+    const [path] = args as [string]
+    if (nonExistentFiles.includes(path)) {
+      return false
+    }
+    return path in fileContents || true
+  })
+
+  // Mock readFileSync to return the content for known files
+  mockReadFileSync.mockImplementation((...args: unknown[]): string => {
+    const [path, options] = args as [string, BufferEncoding]
+    if (options === 'utf-8' && path in fileContents) {
+      return fileContents[path]
+    }
+    throw new Error(`Unexpected file read: ${path}`)
+  })
+}
+
+/**
+ * Helper function to mock action inputs
+ * @param inputs - Object mapping input names to their values
+ */
+function mockInputs(inputs: Record<string, string> = {}): void {
+  // Default values that are applied unless overridden
+  const defaultInputs: Record<string, string> = {
+    token: 'fake-token'
+  }
+
+  // Combine defaults with user-provided inputs
+  const allInputs: Record<string, string> = { ...defaultInputs, ...inputs }
+
+  core.getInput.mockImplementation((name: string) => {
+    return allInputs[name] || ''
+  })
+}
+
+/**
+ * Helper function to verify common response assertions
+ */
+function verifyStandardResponse(): void {
+  expect(core.setOutput).toHaveBeenNthCalledWith(1, 'response', 'Hello, user!')
+  expect(core.setOutput).toHaveBeenNthCalledWith(
+    2,
+    'response-file',
+    expect.stringContaining('modelResponse.txt')
+  )
+}
+
+jest.unstable_mockModule('fs', () => ({
+  existsSync: mockExistsSync,
+  readFileSync: mockReadFileSync
+}))
+
 jest.unstable_mockModule('@actions/core', () => core)
 
 // The module being tested should be imported dynamically. This ensures that the
@@ -36,37 +110,270 @@ jest.unstable_mockModule('@actions/core', () => core)
 const { run } = await import('../src/main.js')
 
 describe('main.ts', () => {
+  // Reset all mocks before each test
   beforeEach(() => {
-    // Set the action's inputs as return values from core.getInput().
-    core.getInput.mockImplementation((name) => {
-      if (name === 'prompt') return 'Hello, AI!'
-      if (name === 'system_prompt') return 'You are a test assistant.'
-      if (name === 'model_name') return 'gpt-4o'
-      return ''
-    })
-  })
-
-  afterEach(() => {
-    jest.resetAllMocks()
+    jest.clearAllMocks()
   })
 
   it('Sets the response output', async () => {
+    // Set the action's inputs as return values from core.getInput().
+    mockInputs({
+      prompt: 'Hello, AI!',
+      'system-prompt': 'You are a test assistant.'
+    })
+
     await run()
 
-    expect(core.setOutput).toHaveBeenNthCalledWith(
-      1,
-      'response',
-      'Hello, user!'
-    )
+    expect(core.setOutput).toHaveBeenCalled()
+    verifyStandardResponse()
   })
 
-  it('Sets a failed status', async () => {
-    // Clear the getInput mock and return an empty prompt
-    core.getInput.mockClear().mockReturnValueOnce('')
+  it('Sets a failed status when no prompt is set', async () => {
+    // Clear the getInput mock and simulate no prompt or prompt-file input
+    mockInputs({
+      prompt: '',
+      'prompt-file': ''
+    })
 
     await run()
 
     // Verify that the action was marked as failed.
-    expect(core.setFailed).toHaveBeenNthCalledWith(1, 'prompt is not set')
+    expect(core.setFailed).toHaveBeenNthCalledWith(
+      1,
+      'Neither prompt-file nor prompt was set'
+    )
+  })
+
+  it('uses prompt-file', async () => {
+    const promptFile = 'prompt.txt'
+    const promptContent = 'This is a prompt from a file'
+
+    // Set up mock to return specific content for the prompt file
+    mockFileContent({
+      [promptFile]: promptContent
+    })
+
+    // Set up input mocks
+    mockInputs({
+      'prompt-file': promptFile,
+      'system-prompt': 'You are a test assistant.'
+    })
+
+    await run()
+
+    expect(mockExistsSync).toHaveBeenCalledWith(promptFile)
+    expect(mockReadFileSync).toHaveBeenCalledWith(promptFile, 'utf-8')
+    verifyStandardResponse()
+  })
+
+  it('handles non-existent prompt-file with an error', async () => {
+    const promptFile = 'non-existent-prompt.txt'
+
+    // Mock the file not existing
+    mockFileContent({}, [promptFile])
+
+    // Set up input mocks
+    mockInputs({
+      'prompt-file': promptFile
+    })
+
+    await run()
+
+    // Verify that the error was correctly reported
+    expect(core.setFailed).toHaveBeenCalledWith(
+      `File for prompt-file was not found: ${promptFile}`
+    )
+  })
+
+  it('prefers prompt-file over prompt when both are provided', async () => {
+    const promptFile = 'prompt.txt'
+    const promptFileContent = 'This is a prompt from a file that should be used'
+    const promptString = 'This is a direct prompt that should be ignored'
+
+    // Set up mock to return specific content for the prompt file
+    mockFileContent({
+      [promptFile]: promptFileContent
+    })
+
+    // Set up input mocks
+    mockInputs({
+      prompt: promptString,
+      'prompt-file': promptFile,
+      'system-prompt': 'You are a test assistant.'
+    })
+
+    await run()
+
+    expect(mockExistsSync).toHaveBeenCalledWith(promptFile)
+    expect(mockReadFileSync).toHaveBeenCalledWith(promptFile, 'utf-8')
+
+    // Check that the post call was made with the prompt from the file, not the input parameter
+    expect(mockPost).toHaveBeenCalledWith({
+      body: {
+        messages: [
+          {
+            role: 'system',
+            content: expect.any(String)
+          },
+          { role: 'user', content: promptFileContent } // Should use the file content, not the string input
+        ],
+        max_tokens: expect.any(Number),
+        model: expect.any(String)
+      }
+    })
+
+    verifyStandardResponse()
+  })
+
+  it('uses system-prompt-file', async () => {
+    const systemPromptFile = 'system-prompt.txt'
+    const systemPromptContent =
+      'You are a specialized system assistant for testing'
+
+    // Set up mock to return specific content for the system prompt file
+    mockFileContent({
+      [systemPromptFile]: systemPromptContent
+    })
+
+    // Set up input mocks
+    mockInputs({
+      prompt: 'Hello, AI!',
+      'system-prompt-file': systemPromptFile
+    })
+
+    await run()
+
+    expect(mockExistsSync).toHaveBeenCalledWith(systemPromptFile)
+    expect(mockReadFileSync).toHaveBeenCalledWith(systemPromptFile, 'utf-8')
+    verifyStandardResponse()
+  })
+
+  it('handles non-existent system-prompt-file with an error', async () => {
+    const systemPromptFile = 'non-existent-system-prompt.txt'
+
+    // Mock the file not existing
+    mockFileContent({}, [systemPromptFile])
+
+    // Set up input mocks
+    mockInputs({
+      prompt: 'Hello, AI!',
+      'system-prompt-file': systemPromptFile
+    })
+
+    await run()
+
+    // Verify that the error was correctly reported
+    expect(core.setFailed).toHaveBeenCalledWith(
+      `File for system-prompt-file was not found: ${systemPromptFile}`
+    )
+  })
+
+  it('prefers system-prompt-file over system-prompt when both are provided', async () => {
+    const systemPromptFile = 'system-prompt.txt'
+    const systemPromptFileContent =
+      'You are a specialized system assistant from file'
+    const systemPromptString =
+      'You are a basic system assistant from input parameter'
+
+    // Set up mock to return specific content for the system prompt file
+    mockFileContent({
+      [systemPromptFile]: systemPromptFileContent
+    })
+
+    // Set up input mocks
+    mockInputs({
+      prompt: 'Hello, AI!',
+      'system-prompt-file': systemPromptFile,
+      'system-prompt': systemPromptString
+    })
+
+    await run()
+
+    expect(mockExistsSync).toHaveBeenCalledWith(systemPromptFile)
+    expect(mockReadFileSync).toHaveBeenCalledWith(systemPromptFile, 'utf-8')
+
+    // Check that the post call was made with the system prompt from the file, not the input parameter
+    expect(mockPost).toHaveBeenCalledWith({
+      body: {
+        messages: [
+          {
+            role: 'system',
+            content: systemPromptFileContent // Should use the file content, not the string input
+          },
+          { role: 'user', content: 'Hello, AI!' }
+        ],
+        max_tokens: expect.any(Number),
+        model: expect.any(String)
+      }
+    })
+
+    verifyStandardResponse()
+  })
+
+  it('uses both prompt-file and system-prompt-file together', async () => {
+    const promptFile = 'prompt.txt'
+    const promptContent = 'This is a prompt from a file'
+    const systemPromptFile = 'system-prompt.txt'
+    const systemPromptContent =
+      'You are a specialized system assistant from file'
+
+    // Set up mock to return specific content for both files
+    mockFileContent({
+      [promptFile]: promptContent,
+      [systemPromptFile]: systemPromptContent
+    })
+
+    // Set up input mocks
+    mockInputs({
+      'prompt-file': promptFile,
+      'system-prompt-file': systemPromptFile
+    })
+
+    await run()
+
+    expect(mockExistsSync).toHaveBeenCalledWith(promptFile)
+    expect(mockExistsSync).toHaveBeenCalledWith(systemPromptFile)
+    expect(mockReadFileSync).toHaveBeenCalledWith(promptFile, 'utf-8')
+    expect(mockReadFileSync).toHaveBeenCalledWith(systemPromptFile, 'utf-8')
+
+    // Check that the post call was made with both the prompt and system prompt from files
+    expect(mockPost).toHaveBeenCalledWith({
+      body: {
+        messages: [
+          {
+            role: 'system',
+            content: systemPromptContent
+          },
+          { role: 'user', content: promptContent }
+        ],
+        max_tokens: expect.any(Number),
+        model: expect.any(String)
+      }
+    })
+
+    verifyStandardResponse()
+  })
+
+  it('passes custom max-tokens parameter to the model', async () => {
+    const customMaxTokens = 500
+
+    mockInputs({
+      prompt: 'Hello, AI!',
+      'system-prompt': 'You are a test assistant.',
+      'max-tokens': customMaxTokens.toString()
+    })
+
+    await run()
+
+    // Check that the post call was made with the correct max_tokens parameter
+    expect(mockPost).toHaveBeenCalledWith({
+      body: {
+        messages: expect.any(Array),
+        max_tokens: customMaxTokens,
+        model: expect.any(String)
+      }
+    })
+
+    verifyStandardResponse()
   })
 })

action.yml

@@ -11,7 +11,11 @@ branding:
 inputs:
   prompt:
     description: The prompt for the model
-    required: true
+    required: false
+    default: ''
+  prompt-file:
+    description: Path to a file containing the prompt
+    required: false
     default: ''
   model:
     description: The model to use
@@ -25,6 +29,10 @@ inputs:
     description: The system prompt for the model
     required: false
     default: 'You are a helpful assistant'
+  system-prompt-file:
+    description: Path to a file containing the system prompt
+    required: false
+    default: ''
   max-tokens:
     description: The maximum number of tokens to generate
     required: false
@@ -38,6 +46,8 @@ inputs:
 outputs:
   response:
     description: The response from the model
+  response-file:
+    description: The file path where the response is saved
 
 runs:
   using: node20

badges/coverage.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="116" height="20" role="img" aria-label="Coverage: 77.27%"><title>Coverage: 77.27%</title><linearGradient id="s" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="r"><rect width="116" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#r)"><rect width="63" height="20" fill="#555"/><rect x="63" width="53" height="20" fill="#e05d44"/><rect width="116" height="20" fill="url(#s)"/></g><g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" text-rendering="geometricPrecision" font-size="110"><text aria-hidden="true" x="325" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="530">Coverage</text><text x="325" y="140" transform="scale(.1)" fill="#fff" textLength="530">Coverage</text><text aria-hidden="true" x="885" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="430">77.27%</text><text x="885" y="140" transform="scale(.1)" fill="#fff" textLength="430">77.27%</text></g></svg>
+<svg xmlns="http://www.w3.org/2000/svg" width="116" height="20" role="img" aria-label="Coverage: 84.21%"><title>Coverage: 84.21%</title><linearGradient id="s" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="r"><rect width="116" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#r)"><rect width="63" height="20" fill="#555"/><rect x="63" width="53" height="20" fill="#dfb317"/><rect width="116" height="20" fill="url(#s)"/></g><g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" text-rendering="geometricPrecision" font-size="110"><text aria-hidden="true" x="325" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="530">Coverage</text><text x="325" y="140" transform="scale(.1)" fill="#fff" textLength="530">Coverage</text><text aria-hidden="true" x="885" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="430">84.21%</text><text x="885" y="140" transform="scale(.1)" fill="#fff" textLength="430">84.21%</text></g></svg>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "typescript-action",
   "description": "GitHub Actions TypeScript template",
-  "version": "0.0.0",
+  "version": "1.0.0",
   "author": "",
   "type": "module",
   "private": true,
@@ -32,7 +32,7 @@
     "local-action": "npx @github/local-action . src/main.ts .env",
     "package": "npx rollup --config rollup.config.ts --configPlugin @rollup/plugin-typescript",
     "package:watch": "npm run package -- --watch",
-    "test": "NODE_OPTIONS=--experimental-vm-modules NODE_NO_WARNINGS=1 npx jest",
+    "test": "npx cross-env NODE_OPTIONS=--experimental-vm-modules NODE_NO_WARNINGS=1 npx jest",
     "all": "npm run format:write && npm run lint && npm run test && npm run coverage && npm run package"
   },
   "license": "MIT",
@@ -43,30 +43,30 @@
     "@azure-rest/ai-inference": "latest",
     "@azure/core-auth": "latest",
     "@azure/core-sse": "latest",
-    "@eslint/compat": "^1.2.7",
-    "@github/local-action": "^3.1.3",
+    "@eslint/compat": "^1.2.9",
+    "@github/local-action": "^3.2.1",
     "@jest/globals": "^29.7.0",
-    "@rollup/plugin-commonjs": "^28.0.1",
+    "@rollup/plugin-commonjs": "^28.0.3",
     "@rollup/plugin-node-resolve": "^16.0.1",
-    "@rollup/plugin-typescript": "^12.1.1",
+    "@rollup/plugin-typescript": "^12.1.2",
     "@types/jest": "^29.5.14",
-    "@types/node": "^20.17.28",
-    "@typescript-eslint/eslint-plugin": "^8.28.0",
-    "@typescript-eslint/parser": "^8.28.0",
-    "eslint": "^9.23.0",
-    "eslint-config-prettier": "^10.0.2",
-    "eslint-import-resolver-typescript": "^4.3.1",
+    "@types/node": "^22.15.21",
+    "@typescript-eslint/eslint-plugin": "^8.32.1",
+    "@typescript-eslint/parser": "^8.32.1",
+    "eslint": "^9.27.0",
+    "eslint-config-prettier": "^10.1.5",
+    "eslint-import-resolver-typescript": "^4.4.0",
     "eslint-plugin-import": "^2.31.0",
     "eslint-plugin-jest": "^28.11.0",
-    "eslint-plugin-prettier": "^5.2.5",
+    "eslint-plugin-prettier": "^5.4.0",
     "jest": "^29.7.0",
     "make-coverage-badge": "^1.2.0",
     "prettier": "^3.5.3",
-    "prettier-eslint": "^16.3.0",
-    "rollup": "^4.38.0",
-    "ts-jest": "^29.3.0",
+    "prettier-eslint": "^16.4.2",
+    "rollup": "^4.41.1",
+    "ts-jest": "^29.3.4",
     "ts-jest-resolver": "^2.0.1",
-    "typescript": "^5.8.2"
+    "typescript": "^5.8.3"
   },
   "optionalDependencies": {
     "@rollup/rollup-linux-x64-gnu": "*"

src/main.ts

@@ -1,6 +1,40 @@
 import * as core from '@actions/core'
 import ModelClient, { isUnexpected } from '@azure-rest/ai-inference'
 import { AzureKeyCredential } from '@azure/core-auth'
+import * as fs from 'fs'
+import * as os from 'os'
+import * as path from 'path'
+
+const RESPONSE_FILE = 'modelResponse.txt'
+
+/**
+ * Helper function to load content from a file or use fallback input
+ * @param filePathInput - Input name for the file path
+ * @param contentInput - Input name for the direct content
+ * @param defaultValue - Default value to use if neither file nor content is provided
+ * @returns The loaded content
+ */
+function loadContentFromFileOrInput(
+  filePathInput: string,
+  contentInput: string,
+  defaultValue?: string
+): string {
+  const filePath = core.getInput(filePathInput)
+  const contentString = core.getInput(contentInput)
+
+  if (filePath !== undefined && filePath !== '') {
+    if (!fs.existsSync(filePath)) {
+      throw new Error(`File for ${filePathInput} was not found: ${filePath}`)
+    }
+    return fs.readFileSync(filePath, 'utf-8')
+  } else if (contentString !== undefined && contentString !== '') {
+    return contentString
+  } else if (defaultValue !== undefined) {
+    return defaultValue
+  } else {
+    throw new Error(`Neither ${filePathInput} nor ${contentInput} was set`)
+  }
+}
 
 /**
  * The main function for the action.
@@ -9,12 +43,16 @@ import { AzureKeyCredential } from '@azure/core-auth'
  */
 export async function run(): Promise<void> {
   try {
-    const prompt: string = core.getInput('prompt')
-    if (prompt === undefined || prompt === '') {
-      throw new Error('prompt is not set')
-    }
+    // Load prompt content - required
+    const prompt = loadContentFromFileOrInput('prompt-file', 'prompt')
+
+    // Load system prompt with default value
+    const systemPrompt = loadContentFromFileOrInput(
+      'system-prompt-file',
+      'system-prompt',
+      'You are a helpful assistant'
+    )
 
-    const systemPrompt: string = core.getInput('system-prompt')
     const modelName: string = core.getInput('model')
     const maxTokens: number = parseInt(core.getInput('max-tokens'), 10)
 
@@ -60,6 +98,14 @@ export async function run(): Promise<void> {
 
     // Set outputs for other workflow steps to use
     core.setOutput('response', modelResponse || '')
+
+    // Save the response to a file in case the response overflow the output limit
+    const responseFilePath = path.join(tempDir(), RESPONSE_FILE)
+    core.setOutput('response-file', responseFilePath)
+
+    if (modelResponse && modelResponse !== '') {
+      fs.writeFileSync(responseFilePath, modelResponse, 'utf-8')
+    }
   } catch (error) {
     // Fail the workflow run if an error occurs
     if (error instanceof Error) {
@@ -69,3 +115,8 @@ export async function run(): Promise<void> {
     }
   }
 }
+
+function tempDir(): string {
+  const tempDirectory = process.env['RUNNER_TEMP'] || os.tmpdir()
+  return tempDirectory
+}